Gameplay transition and gate

Status: in progress.

Goal

Start with the gate closed, show press-to-play and start the timer after input.

To do

• [x] Add the closed-gate and fresh-press behavior and pause the timer while waiting.
• [x] Check it in the short Editor run with simulated keyboard and gamepad input.
• [x] Restore ready-text opacity and use the existing lit gate-border sprites; a short Editor check confirmed their state before and after a simulated start.
• [ ] Check the first rendered frame, gate motion, prompt, retry and return in a player build.
• [ ] Have the owner check a physical gamepad.

See game flow tests. The checks did not inspect rendered presentation or a physical device; the owner reported the previous build lacked ready text and lighting.